Fig. 1.

SDS–PAGE resolution of aminophenylboronic acid (APB)-purified proteins (5 μg/lane) from the immune complexes of patient and control representatives of North American Indian (NAI) or Caucasian (C) descent. Proteins were silver stained. Lane 1, NAI normal; lane 2, NAI RA anti-advanced glycation end-product (AGE)-negative; lane 3, NAI RA anti-AGE⁺ lane 4, C normal; lane 5, C RA anti-AGE⁻; lane 6, C RA, anti-AGE⁺ lane 7, C diabetic; lane 8, in vitro glycated IgG heavy chain (HC) and light chain (LC) purified by APB chromatography.